Does anyone remember when genetic determinism was a thing?:
Genetic differences between identical twins can begin very early in embryonic development, according to a study that researchers say has implications for examining the effects of nature versus nurture.
Identical – or monozygotic – twins come from a single fertilised egg that splits in two. They are important research subjects because they are thought to have minimal genetic differences. This means that when physical or behavioural differences emerge, environmental factors are presumed to be the likely cause.
But the new research (£), published on Thursday in the journal Nature Genetics, suggests the role of genetic factors in shaping these differences has been underestimated.Agencies, “Identical twins are not so identical, study suggests” at The Guardian
But wait! This is disastrous news for all the claims about how adultery or bad driving are “in yer genes.” If even identical twins don’t …? Wow. Times, they are a-changin’.
The paper is open access.
See also: There’s a gene for that… or is there?